Strangest thing, my 3 year old Lab started favoring her right front leg yesterday - no apparent break, cut, or problem, so we took her to the vet this morning. The vet checked her out and found nothing wrong with the leg except a little swelling. She had a little fever so he did a blood test which proved positive for Lymes. He put her on a strong antibiotic and a pain killer and told us that she should be fine in a few weeks. She's not a field dog and as we live in an urban/suburban neighborhood, be warned that if your dogs start showing any symptoms, get them in for a blood test! The vet said that incidents of Lymes in dogs is really on the upswing in the suburban neighborhoods.